WO2021106617A1 - Système de projection et son procédé de commande - Google Patents

Système de projection et son procédé de commande Download PDF

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Publication number
WO2021106617A1
WO2021106617A1 PCT/JP2020/042384 JP2020042384W WO2021106617A1 WO 2021106617 A1 WO2021106617 A1 WO 2021106617A1 JP 2020042384 W JP2020042384 W JP 2020042384W WO 2021106617 A1 WO2021106617 A1 WO 2021106617A1
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WIPO (PCT)
Prior art keywords
image
projection system
light
image light
image forming
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Application number
PCT/JP2020/042384
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English (en)
Japanese (ja)
Inventor
太陽 木本
Original Assignee
ソニーセミコンダクタソリューションズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by ソニーセミコンダクタソリューションズ株式会社 filed Critical ソニーセミコンダクタソリューションズ株式会社
Priority to JP2021561305A priority Critical patent/JPWO2021106617A1/ja
Priority to US17/756,133 priority patent/US11917342B2/en
Publication of WO2021106617A1 publication Critical patent/WO2021106617A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3191—Testing thereof
    • H04N9/3194—Testing thereof including sensor feedback
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/142—Adjusting of projection optics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/312—Driving therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3155—Modulator illumination systems for controlling the light source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/317—Convergence or focusing systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3185—Geometric adjustment, e.g. keystone or convergence

Definitions

  • This technology relates to a projection system and its control method.
  • An image projection device such as a projector forms image light by modulating the light from a light source with a light modulation element, and displays the image on a screen or the like via a projection lens.
  • a technique of detecting the projected image light and adjusting the positional shift of the light modulation element, the brightness of the image, and the like there is known a technique of detecting the projected image light and adjusting the positional shift of the light modulation element, the brightness of the image, and the like.
  • Patent Document 1 outputs a polarizing separation means for separating unnecessary polarization components unnecessary for projection from among the polarization components of synthetic image light emitted from a synthetic optical system, and image data corresponding to the separated unnecessary polarization components.
  • a projector including an image sensor for adjusting the position of a plurality of light modulation elements corresponding to different color components based on image data output from the image sensor and a position adjustment control device for adjusting the positions of a plurality of light modulation elements is disclosed.
  • Patent Documents 2 and 3 disclose an image display device that guides a part of the light synthesized by the color synthesis optical system to a light amount sensor and keeps the brightness of the projected image constant based on the measured value of the light amount sensor. Has been done.
  • a polarizing separation means is arranged on the emission optical axis of the image light to part of the image light. Is configured to receive light with an image sensor or a light amount sensor. Therefore, the image light projected on the screen always passes through the polarization separating means, so that the brightness is lowered. Similarly, the image received by the image sensor or the light amount sensor via the polarization separating means also has a problem that the brightness is insufficient and the projected image cannot be measured accurately.
  • an object of the present technology is to provide a projection system capable of accurately measuring a projected image while preventing a decrease in the brightness of the projected image and a control method thereof.
  • the projection system includes an image forming device, a projection lens, a measuring device, a control device, and a measurement assisting device.
  • the image forming apparatus forms an image light.
  • the projection lens projects the image light.
  • the measuring device measures the image light.
  • the control device controls the image forming device based on the output of the measuring device.
  • the measurement assisting device is arranged between the image forming device and the projection lens, and has a first state in which the image light is incident on the projection lens and a second state in which the image light is incident on the measuring device. It is configured so that it can be selectively switched between states.
  • the measurement assisting device may have a light reflecting element that reflects the image light toward the measuring device in the second state.
  • the light reflecting element may be a dimming element capable of switching between a light transmitting mode and a light blocking mode.
  • the light reflecting element is configured to be movable or rotatable between a first position, which is a position separated from the optical axis of the image forming apparatus, and a second position, which is a position on the optical axis. May be good.
  • the light reflecting element may be configured to be switchable between a first posture in which the image light is reflected toward the projection lens and a second posture in which the image light is reflected toward the measuring device. ..
  • the measuring device may include an image pickup device.
  • the image pickup device may be arranged in the image forming apparatus.
  • the projection system may further include an imaging device that captures a projected image by the projection lens.
  • the control device controls the image forming device based on the output of the measuring device and the output of the imaging device.
  • the control device may have an evaluation unit that evaluates the image light based on the output of the measuring device.
  • the image forming apparatus may include a three-plate type image display element.
  • the image forming apparatus may include a single plate type image display element.
  • the image display element may be a self-luminous display element.
  • a method of controlling a projection system includes forming image light by an image forming apparatus. When projecting the image light, the image light is incident on the projection lens. When evaluating the image light, a light reflecting element is arranged between the image forming device and the projection lens, and the image light reflected by the light reflecting element is incident on the measuring device.
  • FIG. 1 is a schematic configuration diagram of a projection system 100 according to a first embodiment of the present technology.
  • the projection system 100 of the present embodiment is configured as an image projection device that projects an image on a projection surface such as a screen S.
  • the projection system 100 includes an image forming device 10, a projection lens 20, a measuring device 30, a controller 40, and a measuring auxiliary device 50.
  • the image forming apparatus 10 forms the image light L projected on the screen S.
  • the image forming apparatus 10 includes a light source 11, a first dichroic mirror 12, a second dichroic mirror 13, a first reflection mirror 14, a second reflection mirror 15, a third reflection mirror 16, and 3.
  • a plate-type image display element it has liquid crystal panels 17R, 17G, 17B, a composite prism 18, and a drive circuit 19.
  • the light source 11 is, for example, an ultra-high pressure mercury lamp, which emits white light.
  • the light source 11 may include optical elements such as a UV cut filter, a fly-eye lens, and a condenser lens.
  • the first dichroic mirror 12 reflects, for example, red light among the white light emitted from the light source 11, and transmits blue light and green light.
  • the red light reflected by the first dichroic mirror 12 is reflected by the first reflection mirror 14 and incident on the liquid crystal panel 17R.
  • the second dichroic mirror 13 transmits, for example, blue light among the blue light and green light transmitted through the first dichroic mirror 12, and reflects the green light.
  • the green light reflected by the second dichroic mirror 13 is incident on the liquid crystal panel 17G.
  • the blue light transmitted through the second dichroic mirror 13 is reflected by the second reflection mirror 15 and the third reflection mirror 16 and incident on the liquid crystal panel 17B.
  • the synthetic prism 18 synthesizes the red light emitted from the liquid crystal panel 17R, the green light emitted from the liquid crystal panel 17G, and the blue light emitted from the liquid crystal panel 17B on the same optical path.
  • the image light L which is the combined light of the synthetic prism 18, is magnified and projected onto the screen S by the projection lens 20.
  • the drive circuit 19 controls the output of the light source 11. Further, the drive circuit 19 applies red light, green light, and blue light signal voltages to the liquid crystal panels 17R, 17G, and 17B, respectively, based on the input signal including the image information, and the liquid crystal panels 17R, 17G, and 17B, respectively. Drive each pixel of.
  • the red image, the green image, and the blue image formed by the liquid crystal panels 17R, 17G, and 17B are combined by the synthetic prism 18 as described above and projected on the screen S.
  • the image forming apparatus 10 may have various optical elements such as a polarizing film and a 1/2 wavelength plate arranged at appropriate positions.
  • a laser light source may be used as the light source 11, and in this case, a MEMS (Micro Electro Mechanical System) device that spatially modulates the laser light separated into each color is used instead of the liquid crystal panels 17R, 17G, and 17B. May be good.
  • MEMS Micro Electro Mechanical System
  • the projection lens 20 is installed in a housing 1 that houses an image forming device 10, a measuring device 30, a controller 40, and a measuring auxiliary device 50.
  • the projection lens 20 is arranged on the optical axis of the composite prism 18, and projects the image light L emitted from the composite prism 18 onto the screen S.
  • the projection lens 20 is typically composed of a lens unit capable of adjusting the focal position of the image light L or the like according to a user operation.
  • the measuring device 30 is a sensor head for measuring the image light formed by the image forming device 10.
  • the measuring device 30 includes a solid-state imaging device such as a CMOS (Complementary Metal Oxide Semiconductor) or a CCD (Charge Coupled Device).
  • the measuring device 30 receives the image light via the measuring auxiliary device 50 described later, and outputs the detection signal (image signal) to the controller 40.
  • the controller 40 has a control device 41 and a memory 42.
  • the control device 41 is composed of a computer including an arithmetic element such as a CPU.
  • the control device 41 controls the drive of the image forming device 10 based on the output of the measuring device 30.
  • the control device 41 has, as a functional block, an image processing unit that processes a detection signal output from the measuring device 30, and an evaluation unit that evaluates image light based on the image-processed image.
  • the evaluation content of the image light is not particularly limited, and typically, the brightness (brightness) of the image light, the presence or absence of image defects due to deterioration of the liquid crystal panels 17R, 17G, 17B, registration deviation, etc., and the image forming apparatus 10 are configured. The presence or absence of deterioration of each optical element is mentioned.
  • the control device 41 compares the output of the measuring device 30 with various reference data read from the memory 42, and controls the drive circuit 19 so as to obtain the target image light to calibrate the image light. Execute the process.
  • the memory 42 is a storage device such as a semiconductor storage element or a hard disk, and includes evaluation results of image light by the control device 41, projected image data based on the input signal, and control parameters of the liquid crystal panels 17R, 17G, and 17B by the drive circuit 19. Stores various reference data including.
  • the measurement assist device 50 is arranged inside the housing 1 and can selectively switch between a first state in which the image light is incident on the projection lens 20 and a second state in which the image light is incident on the measurement device 30. It is composed of.
  • the measurement assisting device 50 is typically switched to the first state when projecting an image onto the screen S, and is switched to the second state when performing an image light calibration process. The switching of the first and second states of the measurement assist device 50 is executed by the controller 40.
  • the measurement assisting device 50 is composed of a dimming element arranged between the image forming device 10 and the projection lens 20.
  • a dimming element include a dimming element such as a liquid crystal shutter or a high-contrast dimming film having a translucent mode and a light-shielding mode.
  • the translucent mode corresponds to the first state
  • the shading mode corresponds to the second state.
  • the measurement assist device 50 is arranged on the optical axis of the image light L emitted from the synthetic prism 18. In the translucent mode, the measurement assist device 50 functions as a transparent screen. The higher the transmittance of the image light L in the translucent mode, the more preferable, and typically, it is 90% or more. On the other hand, in the light-shielding mode, the measurement assisting device 50 functions as a light reflecting element that reflects the image light L toward the measuring device 30.
  • the measurement assisting device 50 when the image is projected on the screen S, the measurement assisting device 50 is switched to the first state (translucency mode). As a result, the image light L emitted from the synthetic prism 18 passes through the measurement auxiliary device 50 in the transparent state, enters the projection lens 20, and is projected onto the screen S.
  • the measurement auxiliary device 50 is switched to the second state (light-shielding mode).
  • the image light L emitted from the synthetic prism 18 does not reach the projection lens 20, is reflected by the measurement auxiliary device 50, and is incident on the measurement device 30.
  • the measuring device 30 generates an image signal corresponding to the incident image light L, and outputs this as a detection signal to the controller 40.
  • the control device 41 performs image processing on the output of the measuring device 30 and evaluates whether or not the image has a target image quality. At this time, the control device 41 may control the drive circuit 19 so that the image forming device 10 forms the image light of the calibration pattern.
  • the drive circuit 19 when the image light L does not reach the target brightness, the drive circuit 19 is controlled to increase the output of the light source 11. Further, when it is evaluated that an arbitrary color image shift has occurred based on the image signal acquired by the measuring device 30, the drive circuit 19 adjusts the image display position of the corresponding liquid crystal panel.
  • the execution timing of the calibration process is not particularly limited, and may be executed in the standby mode of the projection system 100, may be executed immediately before the image projection, or may be executed within a predetermined period after the end of the image projection. Good.
  • the measurement assisting device 50 is composed of a dimming element capable of selectively switching between two states of the light transmission mode and the light blocking (reflection) mode.
  • the image light L formed in the image forming apparatus 10 can be incident on the projection lens 20 or the measuring apparatus 30 without lowering the brightness or the brightness thereof. it can.
  • a high-brightness image can be projected on the screen S, and a high-brightness photographed image can be acquired by the measuring device 30, so that accurate image measurement becomes possible.
  • the measuring device 30 is configured to capture image light inside the housing 1, the influence of the projection surface such as the screen S, the lens characteristics of the projection lens 20, and the peripheral light outside the housing 1 Data without external factors such as can be acquired. As a result, the image light can be calibrated with high accuracy. In addition, the calibration process can be executed without showing the image for calibration to the user.
  • the configuration can be simplified and the occurrence of measurement failure due to the misalignment of the measurement auxiliary device 50 can be prevented.
  • FIG. 2 is a schematic configuration diagram of the projection system 200 according to the second embodiment of the present technology.
  • configurations different from those of the first embodiment will be mainly described, and the same configurations as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified.
  • the projection system 200 of the present embodiment is different from the first embodiment in that it further includes an image pickup device 60 that captures a projected image by the projection lens 20.
  • the image pickup device 60 is composed of a solid-state image pickup element such as CMOS or CCD, and is configured to be capable of capturing an image projected on the screen S.
  • the image pickup apparatus 60 is arranged outside the housing 1, and is typically installed on the outer surface of the housing 1.
  • the installation location in the housing 1 is not particularly limited, and is typically arranged in front of the housing 1 in which the projection lens 20 is installed.
  • the image pickup device 60 is not limited to the example of being installed in the housing 1, and may be installed at a position different from that of the housing 1.
  • the image data taken by the image pickup device 60 is input to the controller 40.
  • the control device 41 of the controller 40 controls the image forming device 10 based on the output of the measuring device 30 and the output of the imaging device 60.
  • the control device 41 acquires the image data to be projected (via the drive circuit 19) from the input signal. Further, the control device 41 acquires the image light L on the optical axis from the measuring device 30, which does not have the lens characteristics of the projection lens 20 and does not distort the projected image. Further, the control device 41 captures a projection image viewed by the user from the image pickup device 60, that is, an image having distortion such as a trapezoid depending on the installation environment such as the posture of the housing 1 due to the lens characteristics of the projection lens 20. Get the data.
  • the input signal and the output signal of the measuring device 30 it is possible to correct image defects due to deterioration of the liquid crystal panels 17R, 17G, 17B and registration deviation with high accuracy. Further, based on the output of the measuring device 30 and the output of the imaging device 60, it is possible to acquire the projected images before and after the lens characteristics of the projection lens 20 are applied, and to correct the distortion of the projection lens 20 with high accuracy. Further, the shape of the projected image can be detected based on the input signal and the output of the image pickup apparatus 60, and keystone correction and the like can be appropriately performed.
  • FIG. 3 is a schematic configuration diagram of the projection system 300 according to the third embodiment of the present technology.
  • configurations different from those of the first embodiment will be mainly described, and the same configurations as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified.
  • the projection system 300 of the present embodiment has a different configuration of the measurement assisting device from that of the first embodiment.
  • the measurement assisting device 51 includes a light reflecting element 51a such as a reflecting mirror, and a drive cylinder 51b that movably supports the light reflecting element 51a inside the housing 1. The operation of the drive cylinder 51b is controlled by the controller 40.
  • the light reflecting element 51a is at a first position (position shown by a solid line in FIG. 3) at a position separated from the optical axis of the image forming apparatus 10 (synthetic prism 18) which is the emission optical axis of the image light L.
  • the second position (the position indicated by the two-point chain line in FIG. 3), which is the position on the optical axis, can be linearly moved.
  • the second position is set to a position where the image light L from the image forming apparatus 10 is reflected toward the measuring apparatus 30 by the light reflecting element 51a.
  • the measurement assisting device 51 transfers the image light L from the image forming device 10 to the projection lens 20 when the light reflecting element 51a is in the first position. It takes the first state of being incident. On the other hand, the measurement assisting device 51 takes a second state in which the image light L from the image forming device 10 is reflected and incident on the measuring device 30 when the light reflecting element 51a is in the second position. Thereby, the same effect as that of the first embodiment can be obtained.
  • FIG. 4 is a schematic configuration diagram of the projection system 400 according to the fourth embodiment of the present technology.
  • configurations different from those of the first embodiment will be mainly described, and the same configurations as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified.
  • the projection system 400 of the present embodiment has a different configuration of the measurement assisting device from that of the first embodiment.
  • the measurement assisting device 52 has a light reflecting element 52a such as a reflecting mirror, and a rotating shaft 52b that rotatably supports the light reflecting element 52a inside the housing 1. The operation of the rotating shaft 52b is controlled by the controller 40.
  • the light reflecting element 52a is a first position (a position shown by a solid line in FIG. 4) at a position separated from the optical axis of the image forming apparatus 10 (synthetic prism 18) which is the emission optical axis of the image light L.
  • the second position (the position indicated by the alternate long and short dash line in FIG. 4), which is a position on the optical axis, is rotatably configured around the rotation shaft 52b. The second position is set to a position where the image light L from the image forming apparatus 10 is reflected toward the measuring apparatus 30 by the light reflecting element 52a.
  • the measurement assisting device 52 transmits the image light L from the image forming device 10 to the projection lens 20 when the light reflecting element 52a is in the first position. It takes the first state of being incident. On the other hand, when the light reflecting element 52a is in the second position, the measurement assisting device 52 takes a second state of reflecting the image light L from the image forming device 10 and incidenting it on the measuring device 30. Thereby, the same effect as that of the first embodiment can be obtained.
  • ⁇ Fifth Embodiment> 5 and 6 are schematic configuration diagrams of the projection system 500 according to the fifth embodiment of the present technology.
  • configurations different from those of the first embodiment will be mainly described, and the same configurations as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified.
  • the projection system 500 of the present embodiment has a different configuration of the measurement assisting device from that of the first embodiment.
  • the measurement assisting device 53 includes a first light reflecting element 53a such as a reflecting mirror and a second light reflecting element 52b such as a reflecting mirror.
  • the first light reflecting element 53a and the second light reflecting element 53b are respectively arranged at predetermined positions inside the housing 1, and the first light reflecting element 53a is configured to be rotatable around a rotation axis (not shown). To.
  • the first light reflecting element 53a is configured to selectively take the first posture shown in FIG. 5 and the second posture shown by the solid line in FIG. In the first posture, the first light reflecting element 53a reflects the image light L from the image forming apparatus 10 toward the second light reflecting element 53b.
  • the second light reflecting element 53b reflects the reflected light from the first light reflecting element 53a in the first posture toward the projection lens 20.
  • the first light reflecting element 53a reflects the image light L from the image forming apparatus 10 toward the measuring apparatus 30 in the second posture.
  • the posture of the first light reflecting element 53a is controlled by the controller 40.
  • the measurement assisting device 53 projects the image light L from the image forming device 10 when the first light reflecting element 53a is in the first posture. It takes the first state of being incident on 20. On the other hand, the measurement assisting device 53 takes a second state in which the image light L from the image forming device 10 is reflected and incident on the measuring device 30 when the first light reflecting element 53a is in the second posture. Thereby, the same effect as that of the first embodiment can be obtained.
  • FIG. 7 is a schematic configuration diagram of the projection system 600 according to the sixth embodiment of the present technology.
  • configurations different from those of the first embodiment will be mainly described, and the same configurations as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified.
  • the projection system 600 of the present embodiment has a different configuration of the image forming apparatus from the first embodiment.
  • the image forming apparatus 610 includes a blue light source 611, a phosphor 612, a color wheel 613, a liquid crystal panel 614 as a single-plate image display element, and a drive circuit 615.
  • the blue light source 611 emits blue light to the phosphor 612.
  • the phosphor 612 is excited by being irradiated with blue light and emits white light toward the color wheel 613.
  • the color wheel 613 typically has a rotating body in which red, green, and blue color filters are sequentially arranged in the circumferential direction, and rotates at a predetermined rotation speed to emit red light, green light, and blue light. It is divided and irradiated to the liquid crystal panel 614.
  • the liquid crystal panel 614 forms an image corresponding to the input signal based on the control command from the drive circuit 615, and emits the image light L toward the projection lens 20.
  • the measurement assist device 50 is arranged between the liquid crystal panel 614 and the projection lens 20 on the optical axis of the image light L. Similar to the first embodiment, the measurement assisting device 50 has a translucent mode (first state) in which the image light L is incident on the projection lens 20 and a shading mode in which the image light L is reflected toward the measuring device 30. It is a dimming element that can selectively switch between (second state) and. Not limited to this, the measurement assisting devices 51 to 53 (see FIGS. 3 to 6) described in the third to fifth embodiments may be used as the measuring assisting device.
  • the projection system 600 of the present embodiment configured as described above can also obtain the same effects as those of the first embodiment described above.
  • the image forming apparatus since the number of liquid crystal panels 614 constituting the image forming apparatus 110 is one (single plate), the image forming apparatus is downsized as compared with the case of the three-plate type as in the first embodiment. can do.
  • a MEMS device such as a digital mirror device (DMD) may be used instead of the liquid crystal panel 614.
  • DMD digital mirror device
  • FIG. 8 is a schematic configuration diagram of the projection system 700 according to the seventh embodiment of the present technology.
  • configurations different from those of the first embodiment will be mainly described, and the same configurations as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified.
  • the projection system 700 of the present embodiment has a different configuration of the image forming apparatus from the first embodiment.
  • the image forming apparatus 710 includes a red self-luminous display panel 711R, a green self-luminous display panel 711G, a blue self-luminous display panel 711B, a synthetic prism 712, and a drive circuit 713.
  • the red self-luminous display panel 711R, the green self-luminous display panel 711G, and the blue self-luminous display panel 711B are typically composed of an organic EL display element, and an image corresponding to an input signal based on a control command from the drive circuit 713. To form.
  • the synthetic prism 712 synthesizes the images of the self-luminous display panels 711R, 711G, and 711B of each color, and emits the image light L toward the projection lens 20.
  • the measurement assisting device 50 is arranged between the synthetic prism 712 and the projection lens 20 on the optical axis of the image light L. Similar to the first embodiment, the measurement assisting device 50 has a translucent mode (first state) in which the image light L is incident on the projection lens 20 and a shading mode in which the image light L is reflected toward the measuring device 30. It is a dimming element that can selectively switch between (second state) and. Not limited to this, the measurement assisting devices 51 to 53 (see FIGS. 3 to 6) described in the third to fifth embodiments may be used as the measuring assisting device.
  • the projection system 700 of the present embodiment configured as described above can also obtain the same effects as those of the first embodiment described above.
  • the blue self-luminous display panel 711B has a weaker emission intensity than the red and green self-luminous display panels 711R and 711G, and when it emits light according to the amount of red and green light. , The blue self-luminous display panel 711B deteriorates faster. Such deterioration can also be detected based on the output of the measuring device 30.
  • FIG. 9 is a schematic configuration diagram of the projection system 700 according to the eighth embodiment of the present technology.
  • configurations different from those of the first embodiment will be mainly described, and the same configurations as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified.
  • the projection system 800 of the present embodiment has a different configuration of the image forming apparatus from the first embodiment.
  • the image forming apparatus 810 has a self-luminous display panel 811 and a drive circuit 812.
  • the self-luminous display panel 811 is typically composed of a full-color organic EL display element, forms an image corresponding to an input signal based on a control command from the drive circuit 813, and directs the image light L toward the projection lens 20. Is emitted.
  • the measurement assist device 50 is arranged between the self-luminous display panel 811 and the projection lens 20 on the optical axis of the image light L. Similar to the first embodiment, the measurement assisting device 50 has a translucent mode (first state) in which the image light L is incident on the projection lens 20 and a shading mode in which the image light L is reflected toward the measuring device 30. It is a dimming element that can selectively switch between (second state) and. Not limited to this, the measurement assisting devices 51 to 53 (see FIGS. 3 to 6) described in the third to fifth embodiments may be used as the measuring assisting device.
  • the projection system 800 of the present embodiment configured as described above can also obtain the same effects as those of the first embodiment described above.
  • the image forming apparatus can be made smaller and thinner, so that it can be configured as a direct-view image display apparatus such as a viewfinder or a head-mounted display.
  • the position of the measuring device 30 for measuring the image light L is not particularly limited as long as it does not interfere with the projection of the image light L.
  • the measuring device 30 is arranged on the right side in the figure with respect to the optical axis of the image light L, but on the opposite side (left side in the figure). It may be arranged. Further, as shown in FIGS. 10A and 10B, the measuring device 30 may be arranged above or below the optical axis of the image light L in the drawing.
  • the measurement assisting device 50 may be arranged so as to be inclined by a predetermined angle in a predetermined direction with respect to the optical axis of the image light L.
  • the measuring device 30 may be similarly inclined at an appropriate angle so that the image light L reflected from the measuring auxiliary device 50 can be received.
  • the measuring device 30 may be installed near or integrally with the image forming device 10 (composite prism 18 in the illustrated example). In this case, there is a possibility that the measuring device 30 may block the image light L to obstruct the projection or receive the heat generation temperature of the image forming device 10. In order to avoid such a problem, the measuring device 30 needs to be arranged at a position away from the optical axis of the image light.
  • a heat sink 71 can be interposed on the measuring device 30 and the optical system (for example, the synthetic prism 18).
  • a heat insulating plate may be used instead of the heat radiating plate 71.
  • the shading plate 72 may be installed at an appropriate position around the measuring device 30 so as not to receive light other than the image light reflected from the measuring auxiliary device.
  • the calorific value of the optical system is relatively low. Installation can be done easily.
  • the present technology can have the following configurations.
  • a projection system with a switchable measurement aid is selectively arranged between the image forming apparatus and the projection lens.
  • the projection system with a switchable measurement aid is selectively arranged between the image forming apparatus and the projection lens.
  • the projection system with a switchable measurement aid is selectively arranged between the image forming apparatus and the projection lens.
  • the projection system with a switchable measurement aid is selectively arranged between the image forming apparatus and the projection lens.
  • the projection system with a switchable measurement aid is selectively arranged between the image forming apparatus and the projection lens.
  • the light reflecting element is a projection system that is a dimming element that can switch between a light transmitting mode and a light blocking mode.
  • the light reflecting element is configured to be movable or rotatable between a first position, which is a position separated from the optical axis of the image forming apparatus, and a second position, which is a position on the optical axis. Projection system.
  • the light reflecting element is a projection system configured to be able to switch between a first posture in which the image light is reflected toward the projection lens and a second posture in which the image light is reflected toward the measuring device. .. (6) The projection system according to any one of (1) to (5) above.
  • the measuring device is a projection system including an image sensor. (7) The projection system according to (6) above.
  • the image pickup device is a projection system arranged in the image forming apparatus.
  • An imaging device for capturing a projected image by the projection lens is further provided.
  • the control device is a projection system that controls the image forming device based on the output of the measuring device and the output of the imaging device.
  • the control device is a projection system having an evaluation unit that evaluates the image light based on the output of the measuring device.
  • the image forming apparatus is a projection system including a three-plate image display element.
  • the image forming apparatus is a projection system including a single plate type image display element.
  • the image display element is a projection system that is a self-luminous display element.
  • Image light is formed by an image forming apparatus, and the image light is formed. When projecting the image light, the image light is incident on the projection lens.
  • a control method of a projection system in which a light reflecting element is arranged between the image forming apparatus and the projection lens and the image light reflected by the light reflecting element is incident on the measuring device. ..

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Geometry (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Projection Apparatus (AREA)

Abstract

Un système de projection selon un mode de réalisation de la présente invention est pourvu d'un dispositif de formation d'image, d'une lentille de projection, d'un dispositif de mesure, d'un dispositif de commande et d'un dispositif d'assistance à la mesure. Le dispositif de formation d'image forme une lumière d'image. La lentille de projection projette la lumière d'image. Le dispositif de mesure effectue une mesure de la lumière d'image. Le dispositif de commande commande le dispositif de formation d'image sur la base d'une sortie du dispositif de mesure. Le dispositif d'aide à la mesure est disposé entre le dispositif de formation d'image et la lentille de projection, et il est conçu pour pouvoir commuter de manière sélective entre un premier état dans lequel la lumière d'image est amenée à entrer dans la lentille de projection et un second état dans lequel la lumière d'image est amenée à entrer dans le dispositif de mesure.
PCT/JP2020/042384 2019-11-28 2020-11-13 Système de projection et son procédé de commande WO2021106617A1 (fr)

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JP2021561305A JPWO2021106617A1 (fr) 2019-11-28 2020-11-13
US17/756,133 US11917342B2 (en) 2019-11-28 2020-11-13 Projection system and control method therefor

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US20220417482A1 (en) 2022-12-29
US11917342B2 (en) 2024-02-27

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